In the years following World War II, traditional religious institutions flourished: more than half of all Americans attended weekly church services, and 70 percent were formally affiliated. Religion dominated public discourse and helped propel the civil rights movement. But the culture wars of the 1960s triggered a downward spiral for mainstream Christianity that has continued to the present day. In a new book, New York Times columnist Ross Douthat argues that this loss of a traditional, Christian center is at the heart of America’s current crisis. He says we’ve become a nation of heretics and explains what that means for our future.